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B&Q£50.88Visit shop - 18mm Structural Osb 3 Sterling Board 2440mm X 1220mm (8' X 4')
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The Sterling OSB 3 Structural Board is designed for professional builders and serious DIYers who require a high-performance, load-bearing material for flooring, walling, and roofing projects. Its standout feature is its BBA-approved moisture resistance, making it an excellent choice for damp or humid environments where standard chipboard would fail; however, it is important to note that while it is moisture-resistant, it is not waterproof and should be treated or covered when exposed to prolonged, direct weather conditions.
| Brand | Sterling |
|---|
No, it is moisture-resistant. It can withstand humid conditions and temporary exposure, but it should not be permanently submerged in water.
The 18mm thickness is generally considered the standard for structural flooring, offering enough rigidity to bridge joist spans without deflection.
Yes, provided it is covered with a suitable breather membrane and an external cladding system to protect it from direct, long-term precipitation.
This specific variant comes in a pack containing 8 sheets.
Sterling OSB 3 boards are manufactured using low-emission resins, typically meeting E1 standards for formaldehyde emission levels.
While you can paint OSB, the textured surface will show through. It is recommended to prime and sand the surface or use a filler if a smooth finish is required.
Ensure that adequate expansion gaps were left between boards and that the area is properly ventilated to reduce trapped moisture.
Ensure the correct length of fastener is used and that you are not driving the screw head too deep into the surface of the board.
To ensure optimal performance, verify that your support structure (joists or wall studs) is level and spaced according to local building regulations before installation. When fixing the boards, use high-quality annular ring nails or structural screws to maintain the board's integrity. Ensure a small expansion gap of 3mm between sheets to accommodate natural thermal movement. For long-term protection, especially in external or high-humidity environments, seal edges with a suitable water-repellent treatment and ensure the boards are stored flat and off the ground in a dry, ventilated area before use.
